Brownies topped off with marshmallow frosting and a crunchy cereal mix made with melted chocolate and peanut butter. These marshmallow brownies are over the top amazing!
I’m a brownie girl. I could eat brownies every day of my life.
Then again, who isn’t a fan of brownies?
Thick, fudgy, warm, gooey…count me in.
My homemade brownies are the best around and I’ll fight you on that.
But, sometimes it’s fun to mix things up and go a little cray and that’s what happened here.
I took some brownies and topped them off with this dreamy marshmallow frosting and then spread on a crunchy chocolate peanut butter rice krispies cereal situation.
You guys can’t handle these brownies. But you should try anyway.
How to make marshmallow brownies with a crunchy topping:
First, you can either whip up my homemade brownies or you can start with a box of brownie mix.
I went ahead and used a brownie mix this time around because it’s a little quicker and because the toppings tend to steal the show here anyway.
Bake up your brownies and let them cool completely.
How to make marshmallow frosting:
Add some marshmallow fluff, softened butter, powdered sugar, and vanilla to a bowl and mix on low speed until it’s smooth and creamy.
This marshmallow frosting is seriously over the top amazing.
I like to spread this over chocolate cake too, but today you’re going to grab your cooled brownies and spread it on those guys.
Chocolate Peanut Butter Rice Krispies:
Next up, you’ll want to add some chocolate chips and peanut butter to a small bowl and microwave until melted.
Stir together until smooth and creamy and then pour that goodness over a bowl full of rice krispies cereal.
Stir well and spread that mixture over the top of your frosted brownies.
These need to chill in the fridge for a couple hours to firm up and then you can dig in.
We absolutely LOVE the contrast of the fudgy brownie with the creamy frosting and the crunchy topping.
These are rich, but even so, we totally couldn’t stop munching on these brownies! So fun and who doesn’t love chocolate and peanut butter treats??
More brownie recipes to try:
Nutella Brownies: So gooey and fudgy!
Blonde Brownies: The chewiest!
Oreo Brownies: Hot fudge, Oreo cookies, and brownies – you can’t go wrong!
Buckeye Brownies: Seriously, so good!
Reese’s Brownies: Layers of chocolate, peanut butter, and Reese’s!
Chocolate Peanut Butter Marshmallow Brownies
Ingredients
For the brownies
- 1 batch brownies for 13x9 pan baked and cooled
For the marshmallow frosting
- 1 cup butter
- 7 ounces marshmallow fluff
- 1 cup powdered sugar
- 1 teaspoon vanilla
For the crunchy topping
- 1 ½ cups chocolate chips
- 1 cup peanut butter
- 3 cups rice krispies cereal
Instructions
- Bake and cool the brownies in a 13x9 baking dish using a box mix or a homemade recipe. Set aside.
- Add the butter, marshmallow fluff, powdered sugar, and vanilla to a medium mixing bowl and mix on low speed until well combined and fluffy.
- Spread marshmallow frosting over the cooled brownies.
- Add the chocolate chips and peanut butter to a small bowl and microwave in 30 second bursts until melted. Stir well.
- Pour chocolate and peanut butter over the rice krispies cereal and stir to coat.
- Spread the cereal mixture over the frosted brownies.
- Cover and place in the refrigerator for 2 hours to chill.
- Cut into 16 slices and serve.
Bridgette J. says
Hi, Karly! Happy holidays to you and your beautiful family. I was just wondering if these delectable brownies need to be kept in the fridge for storage or at room temperature? I am thinking about making them for a potluck at my hubby’s work next week. Thank you for sharing your delicious recipes and stories with us. Your blog was one of the first I started following for recipes and I sincerely enjoy snd appreciate all your posts. Thank you so much! ?
Karly says
Hi Bridgette! The crunchy top layer gets a bit melty/soft if it’s kept too warm, so we like to store them in the fridge. Otherwise, they’ll last fine (nothing in the requires refrigeration), but they’ll be a bit messier when eating.
So glad you enjoy the recipes! Thank you for the sweet comment and happy holidays to you as well! 🙂
Bridgette J says
Thank you so very much for the info. I’m going to give these a whirl and I’m excited to taste test them. Your pictures of your creations are gorgeous and make me hungry. ? Sorry about the typos before. Darn autocorrect. ? Take care.
Marie says
I’m just a little bit in love with these right now
Sophie Anderson says
Give it 5 stars! Love all the layers of deliciousness in these brownies but especially chocolatey layer of Rice Krispies on top for that crispy crunchy texture.
Nancy says
I made these yesterday. So, so sweet! I did use part milk chocolate chips as I didn’t have enough semi sweet ones. I did cut them in much smaller pieces than stated in the recipe since they were so sweet. My sweet tooth loved them. Thanks!
Melissa says
Oh girl, I love your dessert style! I’m all about taking something delicious (brownies) and smothering even more deliciousness all over them (marshmallow, peanut butter!) Can’t wait to try!
David @ Spiced says
Woah! What a genius idea to mix chocolate, peanut butter and rice crispies together! I bet I could eat spoonfuls of that by itself…but then you put it on a brownie? With marshmallow frosting? Sign me up for a batch of these! Very unique, and very awesome!
Sabrina says
nice treat, thank you, I haven’t seen this before a clever marshmallow brownie with a crunch, very creative
Yvette says
What size pan did you use? 9X13?
Karly says
Whoops! Yes, a 9×13. Updated the recipe too. Thanks for asking. 🙂
Susan says
These look great!
Can you use Cocoa Krispies?
For Christmas, can you do a layer of green, white & red Marshmallow Frosting? If so, do you need to make three separate batches?
Thank you!
Karly says
You could do cocoa krispies for sure!
As for the layers of frosting, that would be an awful lot of frosting if you tripled it. I would probably divide out one batch and color them. Not sure there will really be enough frosting to layer it like that though. Maybe just sprinkle the top with red and green sprinkles instead?